Forgot to remove lens cap while shooting in public

Forgot to check ISO setting at next event after shooting with high ISO at an evening event, resulting in horribly noisy panoramas

John Riley

Thomas Rauscher

Serge Maandag

Sacha Griffin

Luca Vascon

Yuval Levy

Forgot to set the camera back to autofocus / jpg / p-mode while shooting normal images after shooting a panorama

Serge Maandag

Yuval Levy

Forgot to shoot the zenith

Serge Maandag (numerous times..)

Realizing they forgot a crucial piece of equipment.

Sacha Griffin (batteries on the top of Stone Mountain, compact flash card the second time, tripod on another shoot - requiring the philopod method.)

Carl von Einem (yes: film...)

Luca Vascon (On assignment let the battery on charge... at HOME!, forgot the allen key (on SUNDAY) to adjust the old head)

Yuval Levy (had to buy a USB card reader on assignment)

Dropping the click-stop selector screw

Manfrotto's first panoramic rotation unit "MA300" doesn't have a safety cable (unlike the later "300N" model) to keep the little ball tipped screw close to the "head" so it can be dropped easily while selecting a different number of click stops in the field. If you are unlucky enough "in the field" will just be several meters above ground (think of bridges and canyons...) and so you lose that important piece of your equipment.

Carl von Einem (screw fell off a bridge - happened to me for the first time in 11 years but I was warned about that problem at every panotools meeting!)